Attachment for threshing-machines.



G: 0. PREDRIGKSON. ATTACHMENT FOR THRESHING monmns.

I APPLICATION FILED APR. 1, 1908.

Patented Apr. 13, 1909.

2 SHEETS-SHEET 1.

INVENTOH W/T/VESSES Z m. w

A TTOHNEYS' 1n: NDRRIS PETERS ca, WASHINGTON, nc.

PrlETENT @FFTCE.

CARL OSCAR FREDRIGKSON, OF OSGEOLA, NEBRASKA.

ATTACHMENT FOR THRESHING-MAOHINES.

No. 918,139. Specification of Letters Patent. Patented April 13, 1909.

Application filed April 1, 1908. Serial No. 424,481.

To all whom it may concern:

Be it known that I, CARL Oscar: Fnnn- RICKSON, a citizen of the UnitedStates, and a resident of Osceola, in the county of Polk and State ofNebraska, have invented a new and Improved Attachment for Threshing-Machines, of which the following is a full, clear, and exactdescription.

The invention relates to threshing machines and has for its object toprovide a member which forms a continuation of the concave of athreshing machine, the member being formed of slats which are arrangedlongitudinally of the machine and which as sist in separating the grainfrom the straw, without impeding the movement of the straw through themachine.

Another object is to arrange grain buffers between the working parts ofthe machine and the straw carrier, which will stop any flying grain andcause it to fall into the grain pan without danger of its becomingintermingled again with the straw.

Still another object of the invention is to rovide means to agitate themember which forms a continuation of the concave, to shake the grainfree and also to agitate the grain buffers and free them from dust, etc.

Still other objects of the invention will ap ear in the followingdescription.

11 this specification I will describe the preferred embodiment of theinvention, but I do not limit myself thereto as I consider myselfentitled to all forms and embodiments of the invention which may be heldto fall within the scope of the appended claims.

In the drawing similar reference characters indicate like parts in allthe figures, in which- Figure 1 is a longitudinal sectional view of theparts of the threshing machine, showing the application of my invention;Fig. 2 is a plan view of the same, with the top casing and the cylinderremoved; Fig. 3 is a longi tudinal view of the outside of the machine,showing my preferred means for agitating the grain buffers; and Fig. 4is a sectional plan view, showing the grain buffers.

Referring to the drawings it will be seen that a casing 1, a beater 2, acylinder 3 and a concave 4. are arranged as is customary in threshingmachines; the cylinder 3 having teeth 5 dis osed on its periphery inaccordance with t e usual custom, and the concave 4 having portions ofits surface in the form of a grating as at 6, and also having teeth 7 lwhich are arranged in the usual manner as is familiar to all thoseacquainted with the art. The cylinder 3 is mounted on a shaft 8journaled in the sides of the casing.

My invention particularly relates to the grate-bars 9 and the series oflinks which serve as grain buffers 10, and the means which I willhereafter describe for agitating them. The slatted members 9 are spacedapart and are secured at 11 to the inner terminal of the concave 4.These slatted members are 'preferably curved and are at an angle so thatthe straw will pass from the concave 4 upwardly and toward the strawcarrier 12, which is arranged and operated in the customary manner. Ashaft 13 is journaled in the frame of the machine and extends throughone of its sides and has secured thereto an arm 14. To this shaft 13near the inner walls the machine respectively. At the extremities of thearms of the levers 15 are fastened rods 16, which extend across theinterior of the machine and are used as supports for a series of links10. These links which serve as grain buffers are preferably arranged intwo rows, each row being supported by one of the two rods 16. I preferto have the base of the links 10, cylindrical in form so that one of therods 16 will be passed therethrough which will act as a support for thebuffers as stated above. The grain buffers form a continuation of thiscylindrical portion and extend upwardly to a point nearly level with thetop of the cylinder 3. The buffers are curved and have semicylindricalsurfaces which have their concave faces fronting the cylinder. To thetop of these buffers are pivoted the grate-bars 9, the preferred methodof connecting them being as shown in Fig. 1 so that the slatted memberswill be pivoted alternately to the front and rear rows of buffersrespectively.

In constructing the buffers they may be stamped out of a sheet of metal,the lower end of which may be curved in cylindrical form to permit ofthe introduction of the rod 16. The remainder of the sheet of metal maybe cut at predetermined distances to drical fashion as shown in thedrawings. Nhen the buffers are arranged in this manner as described andare disposed in two rows, it will be found that the buffers will overlapare attached levers 15, which are disposed permit the buffers to becurved in semi-cylineach other which will prevent any of the grain frompassing from the working parts of the machine to the straw carrier.

The rod 1 1 has orifices near its outer terminal which afford means forpivoting an eccentric red 17 which has strap 18 at its upper end whichco-acts with an eccentric 19 which is secured to a shaft 20 on which thebeater 2 is secured. The arm 14 by means of the eccentric rod 17 whichis pivoted as at 21 to the arm 14, rocks the shaft 13 when the threshingmachine is running, and as the shaft 13 rocks, it by means of the leverarms 15, agitates the links 10 and the grate-bars 9 pivoted thereto. Byadjusting the eccentric rod 17 at different places on the arm 14,greater or less agitation of the grate-bars 9 and the links 10 may besecured.

It will, therefore, be seen that in the operation of the threshingmachine in which my invention is used, the straw passing up thegrate-bars 9 will not be hindered in its movements through the machine,because of the fact that there are no transverse members in which thestraw may become caught and that there will be no chance of choking themachine at this point, while by means of the agitation of the grate-bars9 the grain will be freed from the straw and will fall in the usualgrain pan 22 at the bottom of the macl. ine. It will also be seen thatthe agitation of the links 10 which serve as grain bufiers will freethem from dust, grain etc., which otherwise might become caught therein.The shafts S and 20 have the usual pulleys 23 and 24 respectively andare connected by a belt 25.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. In a threshing machine, a threshing cylinder, a concave, a series ofgrate-bars pivoted at the rear of the concave and which form acontinuation thereof, a series of links attached to and which supportthe rear ends of the grate-bars, the said. links having faces which areadapted to serve as buffers for checking the grain projected by thethreshing mechanism, means for supporting the said links, and means foragitating the grate-bars and the links.

2. The combination of a threshing cylinder and a concave, a series ofgrate-bars pivoted at their lower or forward ends across the ma chine onthe rear edge and forming a continuation of a concave grate, a series oflinks pivoted to and supporting the rear ends of the grate-bars, thelinks being formed as buffers for checking the grain projected by thethreshing mechanism, and means pivotally connected to said buffers whichare adapted to impart alternate oscillation through them to thegrate-bars.

3. In a thre hing machine, a threshing cylinder, a concave, a series ofgrate-bars pivoted at the rear of the concave and which form acontinuation thereof, a series of links attached to and which supportthe rear ends of the grate-bars respectively, the said links havingconcave faces which are adapted to serve as buffers for checking thegrain projected by the threshing mechanism, means for supporting thelinks, and means for agitating the grate-bars and the links.

4. In a threshing machine, a threshing cylinder, a concave, a series ofgrate bars pivoted at the rear of the concave and which form acontinuation thereof, the length of each grate bar bein different fromthe length of a neighbor, a series of links attached to and. whichsupport the rear ends of the grate bars respectively, the links havingfaces which serve as buffers and which form as a whole a wall across themachine for stopping the grain which is projected by the threshingcylinder, and supports for the series of links.

5. In a threshing machine, a threshing cylinder, a concave, a series ofgrate bars pivoted at the rear of the concave and which form acontinuation thereof, the grate bars extending rearwardly, the length ofeach grate bar being different from the length of a neighbor, a seriesof links, attached to and which support the rear ends of the grate barsrespectively, the links having faces which serve as buffers and whichform as a whole a wall across the machine for stopping the grain whichis projected by the threshing cylinder, and means for agitating thelinks which also serve as their supports.

6. In a threshing machine, a threshing cylinder, a concave, a series ofgrate-bars pivoted at the rear of the concave and which form acontinuation thereof, a series of links which are attached to thegrate-bars respectively at a plurality of distances from the threshingcylinder, the links having faces which serve as buffers and which formas a whole an unbroken wall across the machine for stopping the grainwhich is projected by the threshing cylinder, rods to which the lowerterminals of the links are pivoted, a lever to which the rods aresecured, and means to rock the lever.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CARL OSCAR FREDRICKSON. W itnesses IRA BANTA,

E. O. NonDLUnD.

